Dover Blackmer DMX IV Manual - Halaman 9

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5.1 PRE-INSTALLATION, CLEANING, INSTALLATION

Please refer to the appropriate component IOM.

5.2 CONNECTION - DMX SYSTEM COMPONENTS

All pneumatic connections must be made with 1/4" DOT

tubing or equivalent. All connections must be direct

(solid tubing) with no side connections. Protect all pneu-

matic connections with compound filling.

All connections between the DMX and the pump must

be free of leaks and use direction connections with no

side connections, in all the environmental conditions

applicable to the application.

The different components shall be linked together as

shown on Figure 2.

THE TRUCK MUST BE EQUIPPED WITH AN AIR PRESSURE

CHECK VALVE TO PREVENT COMPLETE LOSS OF AIR. REFER

TO THE TRUCK OWNERS MANUAL FOR MINIMUM TRUCK AIR

REQUIREMENTS.

REFER TO THE METER MANUFACTURER'S RECOMMENDA-

TIONS REGARDING INSTALLATION OF STRAINERS AFTER THE

PUMP.

5.3 CONNECTIONS - ACP TO FLOW DETECTOR

1. Connect the port marked E on the flow detector to the

compressed air supply from the DMX Air Control

Panel port marked "Air to Flow Detector." (ACP 2 on

Figure 2).

2. Connect the port marked S on the flow detector to the

compressed air supply on the DMX Air Control Panel

port marked "From Flow Detector" (ACP 3 on Figure 2).

3. Connect an exhaust line to the port marked D on the

flow detector. Direct the airflow down towards the

ground or to a dry area.

5.4 CONNECTIONS - SCAVENGING LINE TO DMX

1. At the highest point in the discharge piping prior to the

meter, install an air scavenging line back to one of the

1/4" NPT ports on the sides of the DMX unit. Use 3/8"

DOT tubing or equivalent. See Figure 2.

2. Main piping from the point where the scavenging line

is connected to the Blackmer Flow Detector MUST be

horizontal.

3. The main piping between the DMX and the scaven-

ging line MUST not have a point higher than the sca-

venging line connection before the meter.

5.5 ACP CONNECTIONS TO TRUCK PNEUMATIC

SYSTEM

1. Install a "T" connection in the air shift PTO control line.

Connect an air line from the "T" connection to the side

of the pneumatic valve on top of the DMX unit, and

another line to the ACP "Truck air in" connection line

(marked 1 on Figure 2) (this is the same as the first

statement in the connections for the ACP and DMX

below).

NT 201B-A00 04.06 DMX IV Air elimination system e

5. INSTALLATION (continued)

NOTICES :

2. Connect Line to Engine Speed Control (marked 5 on

Figure 2) to the feature controlling engine speed.

Note that if you have 2 DMX Air Elimination Systems

installed on the truck, and only one truck acceleration

system, it is allowed to use a shuttle valve to compa-

re the signal coming from both ACP's "To engine

Speed Control" to operate your truck engine speed

control.

5.6 CONNECTIONS - ACP AND DMX

1. Install a T connection in the air supply line connecting

the PTO and the ACP port marked "Truck Air In".

Connect the other leg of the T to the pneumatic valve

on top of the DMX (1/8" BSP connection).

2. Connect Port 1 on the DMX pneumatic cover (1/8"

BSP connection) to the ACP port marked "To DMX"

(ACP 4 on Figure 2).

5.7 CONNECTIONS - DMX TO PUMP AIR/

RELIEF VALVE

At the end of the priming phase, the DMX will allow the

pressure to build on the pump air/relief valve. To prevent

pressure spikes in the system during this starting cycle,

the flow going from the DMX to the pump air/relief valve is

restricted.

LEAKAGE FROM THE DMX TO THE PUMP RELIEF VALVE

WILL NOT BE COMPENSATED FOR BY EXTRA FLOW

COMING FROM THE DMX AND WILL CREATE SYSTEM FAI-

LURE : "NO PRIMING".

Most common leakage sources are :

• Leaking connections : quick connect fittings have

been known to leak under cold weather conditions

• Use of shuttle valve : leakage between the different

ports of shuttle valve is common with ball type shuttle

valves, which rely more on flow than pressure to shift.

• Use of pneumatic distributor.

The connection between DMX port #4 and the pump air

relief valve must be a direct line with no side connec-

tions. Quick connect fittings must not be used to connect

the DMX to the pump pneumatic relief valve. No acces-

sories are allowed to be connected between the two

connection ports, with the only exception being pressu-

re gauges when troubleshooting.

INSTALLATION AND MAINTENANCE SHOULD BE PERFORMED

BY QUALIFIED TECHNICIANS ONLY, FOLLOWING THE APPRO-

PRIATE PROCEDURES AND WARNINGS AS PRESENTED IN

THIS MANUAL AND THE APPROPRIATE PUMP INSTALLATION,

OPERATION, AND MAINTENANCE INSTRUCTIONS.

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NOTICE :